♃

The Greek letter Zeta with an abbreviation stroke, for Ζεύς (Zeús), the Greek equivalent to the Roman god Jupiter.[1] The form changed from Ƶ to one with a more salient cross, ♃, in the 15th–16th century, at about the time that Christian crosses were added to ☿, ♀ and ♄, and so may have had a similar motivation.

♃

1. (astronomy, astrology) Jupiter
2. (alchemy) (archaic) tin
3. (botany) (obsolete) herbaceous perennial plant (the orbital period of Jupiter is 12 years)[2]
4. (rare) Thursday (refers to the Latin phrase dies Iovis, which literally means "Jupiter's day")

1. M_♃ Jovian mass (as a unit of measurement; more commonly M_J)
2. R_♃ Jovian radius
3. 🜩 tin ore